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-rw-r--r--src/H5FDstdio.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/src/H5FDstdio.c b/src/H5FDstdio.c
index 7056f7f..4c62bcc 100644
--- a/src/H5FDstdio.c
+++ b/src/H5FDstdio.c
@@ -550,7 +550,11 @@ H5FD_stdio_query(const H5FD_t *_f, unsigned long /*OUT*/ *flags)
/* Quiet the compiler */
_f=_f;
- /* Set the VFL feature flags that this driver supports */
+ /* Set the VFL feature flags that this driver supports.
+ *
+ * Note that this VFD does not support SWMR due to the unpredictable
+ * nature of the buffering layer.
+ */
if(flags) {
*flags = 0;
*flags|=H5FD_FEAT_AGGREGATE_METADATA; /* OK to aggregate metadata allocations */